and in 2011, he was paid a visit in south africa by first lady michelle obama who brought along first daughters malia and sash tha a. nelson mandela re-entered the family of nations. he leaves a legacy of freedom and proof in a one life can make a difference. >> we are one country, we are one people. >> reporter: brian williams, nbc news, new york. >>> we'll have much more on mandela's death in just a moment, but first, a massive winter storm is blasting its way across much of the country. in oklahoma, a number of accidents have been reported due to the recent snow accumulation. temperatures in missouri hit so low that roads became sheets of ice leaving drivers sliding all over the place. and for more on this storm, bill karins is here with the forecast. good morning. >> good morning. and as advertised, this has been just as bad as we expected. many airports will have problems including many people's morning commutes. a lot of school delays, school cancellations out there. the freeze line is the important line. that's the white line. 28 in dallas, 20 in oklahoma city, plenty cold in d